Setting gauge for setting revolvuble emery grinder rollers



J. DRONSFIELD Feb.- 7, 1939.

SETTING GAUGE FOR SETTING REVOLUBLE EMERY GRINDER ROLLERS Filed Aug. 31,1958 SH Q K g a. Q Q E: :5: R V r fi l H mm 0 T N V N '30 "1 & JH/MESDfz cz snuo BWM 6 6p FITT'ORNEY Patented Feb. 7, 1939 UNITED STATESaliens PATENT OFFICE SETTING GAUGE FOR SETTING REVOLV- UBLE EMERYGRINDER ROLLERS James Dronsfield, Oldham, England Application August 31,1938, Serial No. 227,605 In Great Britain March 19, 1938 4 Claims.

same can be set with accuracy to graduations and the emery grinder discthereafter adjusted with respect to the'wire on the cylinder, dofier orthe like to the exact degree conforming to the graduated setting.Further, the general arrangement or combination of parts has somenovelty as a whole for the purpose stated;

The accompanying drawing illustrates the invention, and, in suchdrawing:

Fig. 1 is a front view of the micrometer setting gauge.

Fig. 2 shows a section taken at right-angles on the line II-II, Fig. 1.

Fig. 3 is an end elevation.

Fig. 4 shows a section at right-angles of Fig.

2, taken on the line IV-IV.

Fig. 5 is a section of Fig. 3, taken on the line V-V.

Fig. 6 shows a plan of Fig. 3.

The gauge has a body portion a. conveniently segmental with combined oroff-set boss a and the inner face a of the body portion may be curved orshaped and carefully machined to conform to or so as when applied tobear upon or contact with the shell of the grinder tube on which theemery grinder disc revolves and traverses, and which is indicated by thedotted line If in Fig. 3.

The off set boss at is bored and the upper part of the bore has ascrew-thread a the major or lower part of the bore being plain as shown(see Figs. 2 and 4). In such boss fits a cylindrical socket b, the uppercylindrical part thereof having a screw-thread b whilst the lower partis plain. A reduced annular recess b lies intermediate of thescrew-threaded portion b and the plain portion so that a screw-threadedpinching stud 0 may, when necessary, look any adjustment of thecylindrical socket b. The cylindrical 0 socket b is centrally bored butnot right through, to produce a cup-like cavity 13 for a plunger dconveniently cylindrical and which is shown as having a rounded top (2between the bottom of the cup-like cavity b and the bored inner end ofthe cylindrical plunger A spiral spring d fits (1 and this spring attends to press the cylindrical plunger (1 outwards.

There is a lateral arcuate elongated slot a in the off-set boss a and along screwed stud c is screwed through the wall of the cylindricalsocketb and the inner end of this long screwed stud e engages anelongated vertical sunk slot or recess b? in the cylindrical plunger d.If this long screwed stud e be moved angularly it will (within thelimits of the lateral elongated slot 10' a turn the cylindrical socket band the cylindrical plunger (1. Consequently, by inscribing a mark suchas an arrow tip g on one element, conveniently the element b, andgraduations h on the other element and conveniently the upper face ofthe element a (see Fig. 6), the amount of relative movement made isdenoted or indicated. Use is made of this for the desired accuratesetting of the gauge.

Off-set from the bored boss a is a further bored guide socket a There isalso provided a machined bridge-plate i which has a round or shapedshank i and this shank fits in the bore of the last mentioned guidesocket 11 Before using the described gauge, the cylin- 25 drical socketb is initially set by turning the long screwed stud e to place the arrowtip a opposite zero on the graduated scale h, Fig. 6, this actiontending to slightly advance or move outwards the cylindrical socket b.Thereafter, and with all the parts properly disposed, the body at isapplied so as to contact with the tube t of the emery grinder disc, andwith the long screwed stud e not binding the cylindrical plunger d, thespring (1 pushes said plunger (1 outwards. The bridge plate 2' has itsshank i in the bore of the 35 guide socket a and the bridge plate 1 isdisposed as to its machined under face of one limb over the emerygrinder disc, whilst the under face of the other limb bears on therounded end d of the cylindrical plunger d. When the ma- 40 chinedbridge plate 2' is pressed down onto the surface of the emery grinderdisc, this act will also press down the cylindrical plunger d againstthe action of the spring (1 thus bringing the rounded extremity d ofsaid cylindrical plunger (2 into obsolute alignment with the peripheryof the emery grinder disc.

In this condition the long screwed stud e is screwed-up to jam thecylindrical plunger 01. The bridge plate 2 is then removed from thegauge.

To set the gauge to the desired degree, the long screwed stud e is movedangularly in the lateral slot a the required number of degrees from thezero mark 0 (say 3 degrees representing three one- 55 thousandths) thedegrees being read on the graduations or index h. This gives the knowndesired accurate adjustment, the cylindrical plunger d being retractedthree one-thousandths with respect to the oiT-set boss (L The usersecures the adjustment by clamping with the screw-threaded pinching studso as to firmly bind the cylindrical socket 1) against accidentalinterference.

Having set the gauge to the known degree, the workman applies and usesthe gauge in turn with respect to each end of the grinder tube t of theemery grinder disc and he then sets the emery grinder disc in (byadjusting the support brackets at each end) until the rounded end d ofthe cylindrical plunger d presses on the wire of the cylinder, doffer orthe like. Thus, if the adjustment is A of an inch the emery grinder discis set in to that extent (by trial at each end of the tube t) and willon operation remove that length from the wire.

The graduations may be, as shown at Fig. 6, by marks from 0 to 7, or asmay be required, and so if each mark represents of an inch anyadjustment within the limits of the lateral slot a for the long screwedstud e can be obtained according to the graduations.

I declare that what I claim is:

l. A micrometer setting gauge for the indicated purposes comprising abody portion adapted to bear on the grinder tube, a bored off-set boss,a cylindrical socket fitting said boss, screw-threads on said boss andon said cylindrical socket, graduation markings with respect to saidboss and said socket, a movable plunger fitting said cylindrical socket,a spring device acting on said movable plunger, a screwed device adaptedto engage said cylindrical socket and said movable plunger, said screweddevice being angularly movable in a slot in the off-set boss, a guidesocket in connection with the body. portion of the gauge and a removablebridge plate with shank adapted to fit said guide socket and toco-operate with the movable plunger and the emery grinder disc.

2. A micrometer setting gauge for the indicated purposes comprising abody portion adapted to bear on the grinder tube, a bored oiT-set boss,a cylindrical socket fitting said boss, screw-threads at the upper endof said boss and at the upper end of said cylindrical socket,co-operating graduation marks in connection with said boss and saidsocket, a movable plunger with elongated slot, said plunger fitting thecylindrical socket, a spring acting on said plunger, a screwed deviceadapted to engage said cylindrical socket and said movable plunger andcapable of angular movement in a slot in the off-set boss, a guidesocket on the body portion of the gauge structure, and a removablebridge plate with shank adapted to fit said guide socket and toco-operate with the movable plunger and the emery grinder disc.

3. A micrometer setting gauge for the indicated purposes comprising abody portion, a bored offset boss, a cylindrical socket fitting saidboss, screw-threads on said boss and on said cylindrical socket,graduation markings with respect to said boss and said socket, a movableplunger fitting said cylindrical socket, a spring contrivance acting onsaid movable plunger, a screwed device engaging said cylindrical socketand said movable plunger, a lateral slot in the bored oil-set boss, saidscrewed device being angularly movable in saidslot, a guide socket inconnection with the body portion of the gauge, and a removable bridgeplate with shank adapted to fit said guide socket and to co-operate withthe movable plunger and the emery grinder disc and means to lock thecylindrical socket when the required adjustment thereof has been made.

4. A micrometer setting gauge for the indicated purposes including abody portion, a bored off-set boss, a cylindrical socket fitting saidboss, screwthreads on said boss and on said cylindrical socket,graduation markings with respect to said boss and said socket, a movableplunger guided in the cylindrical socket, a spring device acting on saidmovable plunger, an elongated slot in said movable plunger, a screwedstud engaging said cylindrical socket and the slot in said plunger, anarcuate slot in the bored off-set boss, in which said screwed stud isangularly movable, a guide socket on the gauge body adjacent the boredoiT-set boss, and a removable bridge plate with shank adapted to fitsaid guide socket and to cooperate with the movable plunger and theemery grinder disc, a" groove around the cylindrical socket and ascrewed stud to lock same when the required adjustment of same has beenmade.

JAMES DRONSFIELD.

